The X-ray film showed her lungs, trachea, and alveoli were covered with dust causing the breathing difficulty and vocal cord infection.

The owner said: ‘I never leave her outside for a long time but the dust must come through the window I always open for her while she is staying inside.

‘I hope the story of my dog will alert people about how terrible the pollution is. The dust problem has been going on for a while now and we have no idea when it is going to fade away. All we have to do is protect ourselves and our loved ones.’

Bangkok’s governor today appealed for help to battle the toxic smog shrouding the capital as the deployment of drones left Bangkok residents unimpressed.

The murky haze has led to criticism from the public over the government’s response, which has veered from playing down the problem to abruptly shutting schools.

Authorities have seeded clouds to provoke rain, sprayed overpasses with water to catch micro-pollutants, and even urged people not to burn incense ahead of Chinese New Year.

Troops have also been asked to inspect factories across the country.

Bangkok governor Aswin Kwanmuang compounded the sense of frustration by calling on ‘all sectors’ to find a solution.